Board Thread:Pokémon Help/@comment-31398341-20171026040947/@comment-30245053-20180123145936

Muk-Alola's niche definitely deserves a B+. With Hoopa-U release, Muk-Alola is the only real counter to Hoopa-U. Its bulk, combined with Assault Vest, allows it to check many special attackers like Mega Gengar, Latios, Hoopa-U and Greninja. Mienshao Can Check Hoopa U if it has U turn in addition to mimikyu

252 Atk Life Orb Mienshao U-turn vs. 0 HP / 0 Def Hoopa-Unbound: 588-691 (195.3 - 229.5%) -- guaranteed OHKO

As for mimikyu

252+ Atk Mimikyu Play Rough vs. 0 HP / 0 Def Hoopa-Unbound: 380-450 (126.2 - 149.5%) -- guaranteed OHKO

I'll add a few more mons that can OHKO Hoopa

252 SpA Volcarona Bug Buzz vs. 0 HP / 0 SpD Hoopa-Unbound: 484-576 (160.7 - 191.3%) -- guaranteed OHKO

252 Atk Absol-Mega Megahorn vs. 0 HP / 0 Def Hoopa-Unbound: 880-1036 (292.3 - 344.1%) -- guaranteed OHKO

Keep in mind that absol and Mienshao Can't switch in dierectly into hoopa unbound but can win 1v1s with it